Synopsis of 3×10: A battle between Hydra and S.H.I.E.L.D. will change Coulson’s world; Fitz and Coulson take a huge risk. Rating: ★★★☆☆ With the hype around this show growing every day preceeding the episode, “Maveth” still ended up leaving me feeling rather empty. As far as the episode goes, the first half was essentially …